[Webkit-unassigned] [Bug 208150] New: FuzzDragon -- Null Ptr Deref READ @ WebCore::Document::dispatchDisabledAdaptationsDidChangeForMainFrame

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=208150

            Bug ID: 208150
           Summary: FuzzDragon -- Null Ptr Deref READ @
                    WebCore::Document::dispatchDisabledAdaptationsDidChang
                    eForMainFrame
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pgyanchandani at apple.com

Initial crash is due to re-entrancy in function didBecomeCurrentDocumentInFrame. The re-entrancy was addressed with below change 

Style::PostResolutionCallbackDisabler disabler(*newDocument);
        WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
        ScriptDisallowedScope::InMainThread scriptDisallowedScope; 

But due to an orphan frame access later the crash was observed in initContentSecurityPolicy.

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